Riot police watch for Bahraini anti-government protesters, unseen, near tire fires set by protesters in Sanabis, Bahrain, Oct. 5, 2012. Riot police used water cannons and tear gas on Friday to disperse hundreds of anti-government protesters trying to reach a heavily guarded site that was once the hub of their uprising.

Bahraini anti-government protesters throw petrol bombs at a police water cannon truck during clashes with riot police in Sanabis, Bahrain, Oct. 5.

Bahraini anti-government protesters throw bottles of paint and petrol bombs at a police water cannon truck during clashes in Sanabis, Bahrain, Oct. 5.

Bahraini anti-government protesters carry crates of homemade paint and petrol bombs into clashes with riot police in Sanabis, Bahrain, Oct. 5.

An independent mine worker participates in a protest rally in La Paz, Sept. 18, 2012.

An independent mine worker throws a dynamite stick during clashes with unionized mine workers in La Paz, Sept. 18.

Independent miners attend a protest rally in La Paz September 18, 2012. Thousands of independent mine workers of Bolivia's recently nationalized Colquiri tin mine protested against unionized mine workers and the government of Bolivian President Evo Morales.

A riot police officer helps state-employed miners carry a co-worker after he was wounded in a dynamite explosion during clashes with miners from private cooperatives, as the latter marched through the streets of La Paz, Sept. 18.

Firefighters and policemen help a wounded person during a miners' protest in front of Federacion Nacional de Mineros' headquarters in La Paz, Bolivia, Sept. 18.

Afghan protesters shout slogans during a demonstration in Kabul on Sept.17, against a film that mocks the Prophet Muhammad.

Afghan protesters burn tires in Kabul on Sept. 17.

A protester throws a rock during a clash with the police outside the U.S. Embassy in Jakarta on Sept. 17.

Indian Muslim girls shout slogans during a protest against a film that mocks the Prophet Muhammad in Jammu, India, on Sept. 17. The placard in Urdu reads "Long live Islam."

A supporter of opposition presidential candidate Henrique Capriles hurls stones at supporters of Venezuela's President Hugo Chavez, not seen, who were hurling stones back, before an opposition campaign event started at the International airport in Puerto Cabello, Venezuela, Sept. 12, 2012.

Supporters of Venezuela's President Hugo Chavez hurl stones at supporters of opposition candidate Henrique Capriles, who were hurling stones back, before an opposition campaign event at the International airport in Puerto Cabello, Venezuela, Sept. 12.

A motorcycle burns outside the International airport during clashes in Puerto Cabello, Venezuela, Sept. 12.

Demonstrators wave Catalan flags during a protest rally in Barcelona, Spain, Sept. 11, 2012.

Supporters of independence for Catalonia demonstrate on Sept. 11, in Barcelona.

Left-wing demonstrators burn a Spanish and French flag on top of a stage following a protest rally in Barcelona, Sept. 11.

A woman holds a banner during a demonstration calling for independence during Catalonia's National Day on Sept. 11, in Barcelona.

Ferran Estrada Porta, 79, wearing the traditional 'barretina' hat and holding a Catalan flag, plays his trumpet on the street in Barcelona, Sept. 11.

A man gets caught in a cloud of tear gas fired by police, in background, as they raid a market place in search of suspected protesters in Manama, Bahrain, Sept. 7, 2012.

Bahraini anti-government protesters run from tear gas fired by riot police in the heart of the Gulf's kingdom's capital Manama, Bahrain, Sept. 7.

A protester shows a hand-held tear-gas grenade fired by riot police during an anti-government march in downtown Manama, Bahrain, Sept. 7.

Protesters flash victory sign as they shout anti-government slogans during a march in downtown Manama, Bahrain, Sept. 7.

Riot police officers stand guard as they block supporters of former Maldives' President Mohamed Nasheed during a protest in Male, Maldives, Aug. 30, 2012.

Maldivian riot police chase away supporters of former Maldives' President Mohamed Nasheed during a protest in Male, Maldives, Aug. 30.

Supporters of former Maldives' President Mohamed Nasheed scuffle with an army soldier during a protest in Male, Maldives, Aug. 30.

A supporter of former Maldives' President Mohammed Nasheed is detained during a protest after the commission of national inquiry released its report in Male, Maldives, Aug. 30.

A supporter of former Maldives' President Mohamed Nasheed argues with a police officer during a protest in Male, Maldives, Aug. 30.

Striking miners chant slogans outside a South African mine in Rustenburg on Aug. 15, 2012. Thousands of striking miners armed with machetes and sticks faced off with South African police on Wednesday at Lonmin's Marikana mine after it halted production following the deaths of 10 people in fighting between rival unions. Lonmin, the world's third-largest platinum producer, has threatened to sack 3,000 rock drill operators if they fail to end a wildcat pay strike that started on Friday at Marikana, its flagship mine.

A striking mine worker brandishes his weapons outside a South African mine in Rustenburg on Aug. 15.

Striking miners gather on a hillside at the Lonmin mine near Marikana, South Africa on Aug. 15.

An elderly woman waves as she finds herself caught ahead of an Occupy Wall Street May Day march down Fifth Ave. in New York on May 1.

An Anti-capitalist protester from the 'Occupy' movement lays in front of a police officer in Paternoster Square in London on May 1.

Occupy Wall Street protesters celebrate in Union Square park as they demonstrate in New York City on May 1.

Occupy Wall Street partcipants gather to stage a May Day march at Bryant Park in New York on May 1.

Some protesters chose to demonstrate more quietly during May Day celebrations in New York.

Protesters affiliated with Occupy Wall Street march down Broadway in Manhattan towards Wall Street as a man dressed as Captain America stands in a window on May 1.

A protester holds a rose with a bubble on it in front of police at a rally for International Worker's Day on May 1 in Oakland, Calif.